Agreed: Some people on iud_divas have had success taking HBC for a month to tell their bodies to shut it.

Personally, I spotted almost daily for three months, and then multiple times a week for another three. If it's merely annoying, rather than debilitating, anemia-inducing or life-disrupting, my suggestion would be to try one of the methods people have suggested here and wait out the six months.

Good luck!